Renal sinus lipomatosis: differentiation from space-occupying lesion with aid of computed tomography

Forty-two cases of renal sinus lipomatosis were diagnosed by intravenous urography and nephrotomography. The differential diagnosis from a malignant process necessitated selective renal angiography in 9 cases. With the aid of computed tomography (CT), an invasive technique such as renal angiography appears to be unnecessary in the differential diagnosis of renal sinus lipomatosis. CT seems to be more accurate since it revealed a concomitant cyst in 2 of 4 cases.